Tooth-cleaning preparation



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No Drawing.

7 To all whom it may concern:

Be it known that I, CARL Prnnsrmmi, a

citizen of the United States, residing at Highland Park, in the county ofLake and State of Illinois, have invented a newand useful Improvement in Tooth-Cleaning Preparations, of which the following is a specification.

The present invention relates to tooth cleaning preparations and more particularly to those prepared and dispensed inthe formconversion of the substance to the acid to the extent determined by the equilibrium re-- lation. Such substances I designate hereinafter as potential acids and as typical of these the anhydrids and lactones of the weak organic hydroxy acids may be pointed out. I prefer to employ the lactones of the sugar acids and more particularly of galactonlc acid.

In my prior Patent No. 1,445,3 52, granted February 13, 1923, I have disclosed a tooth cleaning preparation comprising a non-reactive, mildly abrasive filler and a potential acid, such as a su ar acid lactpne, in aqueous solution in equili rium with lts corresponding acid. These const tuents are incorporated in a vehicle containing suitable body forming constituents, such as gum tragacanth, gum\ arabic, glycerme or the like, or mixtures thereof, and also containin if desired, thinning agents such as alco 101.

I In accordance with the present invention,

' in preparing such a tooth cleanin composition, I emplo in it'an aqueous so ution of a potential aci such as a sugar acid lactone, together with sufficient weak organic acid preferably a fruit acid such as malic aci (natural or synthetic) or citric acid, the proportion employed bem sufiicientto impart an initial acidity of p 2 to pH,.

The proportion of lactone resent is at least 1% of the entire mass. or ordinary purposes it may vary from 1 to 4%, and in special cases, where a higher degree of targredients; such as the filler,

Application filed August 1 1923.; semino. 657,782.

tar solvent effect is desired, proportions as high as 10%, or even higher may be employed. I prefer to employ galactonic lactone, although other potential acids, particularly sugar acidlactones, may be employed. suflicient weak or anic acid is used! to impart the desired initial acidity (from pI-I to pH, for example) and, as an illustrative example, in the case of synthetic malic acid from 0.2 to 0.4% of the acid has been found suflicient.

The lactone and the acid are dissolved in an ionizing solvent, such as water, of which from 8 to 20% may be employed. A body forming material, such as gum tragacanth, gum arabic orthe like is alsojncorporated into theaqueous vehicle, a suitable proportion of the gummy material being, for ex-' ample, in the case of of the mixture used.

'From 35 to 40% of a mildly abrasive nonreactive filler is employed, such as tricalc1 um phosphate (preferablyair floated), kieselguhr or the like. Any suitable flavormg constituents, such as salt, essential oils, etc, may be incorporated. A small amount of alcohol, say from 3 to 7% may also be! employed. It is to be clearly understood, of course, that these proportions are not gum arabic, about 3% fixed, but that variations may be made there in in accordance with the desired consistency and texture of the paste, seasonal tempera ture. changes, etc.

In preparing the,paste, the lactone, .acid I and gummy material may be separately dissolved in waterin fairly concentrated solutions and the solutions are mixed in the re-.

quired proportions and diluted to supply the desired amount of water. The other. in-

lyoerine, alcohol, etc. are then incorporate% in the mix tu-re, the flavoring constituents being preferably dissolved in the glycerine or the alcohol.-

I claim: 1

1'. A tooth cleaning preparation comprising an inert filler, a solution of a potential acid in an ionizing solvent and a weak orgtanic acid to impart thereto its initialcacid 1 y.

ing an inert filler, an aqueous solution of galactonie lactone and a weak organic acid to impart thereto its initial acidity; 3. tooth cleaning preparation compris- I 2. A' tooth'cleaning preparation compris- 4. A tooth cleaning prepnmtion eompris-- ing an inert filler, an aqueous solution of n 5 potential acid, and at Week 01 nnic neitl the composition having an initiel acidity of P Z to P 5- 5. A tooth cleaning preparation comprising an inert filler, from 1 to i% of gelne noiogeoe tonic lnetone nnti snifieient week orgnnie pH to ZOHB to the composition.

6. tooth elenning prepm'ntion eoinpiising an inert filler, an aqueous solution of n sngnr eoidl lnctone, glycerine nndln Week on genie acid in amount snfieient to impart initial neidity of 70H, to 70H o tn enmei ininl neidl to import on initinl acidity of item 

